Comfort Systems USA, Inc. is a provider of mechanical and electrical contracting services focused on nonresidential buildings across the United States. The company specializes in the design, engineeri... Comfort Systems USA, Inc. is a provider of mechanical and electrical contracting services focused on nonresidential buildings across the United States. The company specializes in the design, engineering, installation, renovation, and maintenance of heating, ventilation, and air conditioning systems, as well as plumbing, electrical, piping, and building controls. It operates through dedicated mechanical and electrical segments, delivering integrated mechanical, electrical, and plumbing solutions for new construction projects and existing facility upgrades. Comfort Systems USA serves commercial, industrial, and institutional markets, including manufacturing, healthcare, education, office, technology, retail, and government facilities. Its offerings extend to modular and off-site construction, building automation, remote monitoring of key building conditions, and fire protection services. With a broad national footprint composed of numerous operating companies in many locations, Comfort Systems USA, Inc. plays a significant role in supporting critical building infrastructure, energy efficiency initiatives, and long-term facility operations for building owners, developers, and property managers.